Portable power cutter



April 20,1926. I 1,581,265

. J. HOLTZMAN PORTABLE POWER CUTTER Filed De. 22 1921 Patented Apr. 20, 1926.

UNITED STATES PATENT OFFICE.

JOHN HOLTZMA'N, OF. 'NEW YORK, N. Y.

PORTABLE POWER CUTTEI-t'.

Application led December 22, 1921. Seriall No. 524,271.

York, in the county of New York and Statev of New York, have invented certain new and useful Improvements in a Portable Power Cutter, of which the following is a specification.

This invention relates to a portable power cutter. Its object is the production of a power driven cutter, with a circular cutter blade adapted to cut cloth, paper and various other materials. Another object of the invention is the production of a power cutterI which is portable and can be easily brought into contact with the material operated upon. A third object of the invention vis to actuate various tools with the operating mechanism of the device.

In the accompanying drawings Fig. 1

represents a top plan View of an exemplification of one form of the cutter;vFig. 2 vshows a'section of Fig. 1 on the line 2, 2; Fi lin'), 3 and Fig. 4 shows a side elevation of the cutter opera-ting with a sewing machine.

This invention comprises the cylindrical shell 20,l that has formed therewith the offset 21 with the open side portion 21, The shell is open at the upper end and ,has the interior threads 22. A journal bearing 23 is formed at its lower end, and in the olfset 21 are formed the .bearings 24 and 25.

A' bracket 3 1 extends from the upper end of the shell and inturn has formed therewith the knife guide bracket. 32- with the presser flange 33 and protector ball 34. Spacer lugs 38 extend from the bracket 32. A stationary cutter blade 40 is fastened to the lugs 38 by means of the screws 41. A sleeve is indicated in its entirety by the letter A and has formed therewith the guide opening 42 at one end with the shoulder 43 for the enlarged opening 44 at the other end. EX- terior threads 45 are formed at one end of the sleeve A, while at its other end are formed the interior threads 46. The e'xp terior threads'45 are secured into the threads 22 `of the shell 20.` An opening 47 and lugs 48 are formedv with the sleeve A. A threaded guide bushing 49 is screwedinto the threads 46 and has formed therewith the flange 50.

3 indicates asection of Fig. 2 on the- An operating spindle B has its longitudinal axis coincident with the longitudinal axes of the shell 2O and the` sleeve A. The lower end of the spindle B' is supported in the journal bearing 23 and its upper portion is supported in the guide opening 42 of the sleeve A. A thread 51 is formed at the upper end of the spindle B. A worm 54 is located in the shellV 20 and is fastened to the spindle B. A shaft 55 is shouldered at 56 for the threaded shank 57. The said shaft is supported in the bearlngs 24 and 25 tranversely to the spindle B, and the nut 58 engages the shank 57 to maintain the shaft 55 in place. A worm wheel 60 is fastened to the'shaft 55 and meshes with the worm 54. The worm wheel 6,()` is located in the offset 21. A circular cutter blade C is supported on ythe shank 57 and clamped between the bearing 25 and the nut 58. The blade C extends'into the space between the bracket 32 and the stationary cutter blade 40 and bears against the shell 2() and its offset 21. The'stationary cutter.

blade 40 may be magnetized to hold it in place against the circular cutter C.

It will be noted that the shell .20 and the offset' 21 vform a closed chamber for the worm 54 and worm wheel 60,- which maintains the said worm and wheel clear of any of the material out by the cutter and secures their eiiicient operation.

A friction clutch is indicated with the female member D and the male member E. The female member D is in threaded engagement with the Athread 51 of the spindle B, with its lower end spaced from the shoulder 43 to form a ball bearing, race 64 for theball bearing 65. The male member E of the friction clutch isthreaded for the driving shaft F, and the upper end of the latter is guided in the bushing 49.

Aflexible shaft .66 has one end coupled to the driving shaft F and to its other end is connected a source of power not shown.

A spring 69 is interposed between the members D4 and E of the friction clutch.

A pin 72 is fastened in the lugs 48 and hasv ivoted thereona latch with the hook end 73 and the handle'7 4. The-hook end 73 eX- tends through the opening 47 against the top end of the male ofthe friction. clutch. A handle longitudinal opening 77 and fla-nge 78 1S member E and bears 76 with the supported on the sleeve A, with one end bearing against the shell 20 and its other end bearing against the flange 50. The openings 77 provides a clearance space for the lugs 48 and their latch.

'lo operate the cutter shown in Figs. l to 3 inclusive, power is imparted to the driving shaft l" by means of the flexible shaft 66, and the operator bears-down on the handle 74 in the direction of the arrow Gr, which causes the male member E of the clutch to lock with its accompanying female member D. rlhe operating spindle B is Elthen caused to turn and through the intervention of the worm 5d and the worin wheel 60 the circular cutter blade C turns. The bracket 32 with its presser flange 38 is then located under the material to be cut, and the lower face of said material is brought to bear on the top face of said bracket. To stop the cutter blade C turning the operator releases the handle 74 when the male member E will recede fromthe female member l) vof the friction clutch. The protector ball 311 prevents fthe end of the knife bracket 32 and the presser flange 33 entering the material operated upon and uponwhich they/bear' when the cutter is in operationu Referring to Fig. l the cutter is indicated with its handle 76, cutter blade C, stationary cutter blade 40, bracket 8l, flexible shaft 66 and other appurtenances already described., A sewing machine H is indicated with its Hy-wheel 85 and table 86 A pair of strips 87 preferably of pliable material, like rubber, has supported thereon a table 89, which latter has extending therefrom the bracket 90. A pair of links 93, 94 are supported in a pin 95, which in turn is suported in the bracket 90. A spiral spring 96 is wound around the pin 95 and its ends extend under the bottom edges of both links l93 and 94. A friction roller 98 is pivoted in the outer end of the link 93, and a friction roller 99 is pivoted in the outer end of the link 94. The flexible shaft 66 is connected to the pivot of the friction roller 98 and a flexible shaft 100 is connected to the pivot of the friction roller 99. The friction rollers 98 and 99 are in contact with the fly Wheel 85.

To operate the modification indicated in Fig. 4l, the Hy wheel 85 is unlocked from the operating mechanism (not shown) of the sewing machine, and power, not shown, is transmitted to the flexible shaft 100. By this means the friction roller 99 turns. The latter turns the flywheel 85 and thereby the friction roller 98 is turned and the latter turns the flexibleshaft 66. The cutter blade C is turned by means of the latter as already described. ln case the cutter is not to be used, the sewing machine can be driven aesinet Figl allows the same power to be used to operate the cutter as is used for the sewing machine.

Various modifications may be made in the construction ofthe cutter and the present exempliiication is to be taken as illustrative and not limitative thereof.

Having described my invention what 'l desire to secure by Letters Patent and claim l. In a cutter of the character described the combination of a shell, a sleeve with an axial guide opening also an enlarged opening and an opening in the wall of said enlarged opening, extending from the shell, an operating spindle in the shell extending through the guide opening of the sleeve, a clutch member in the enlarged opening of the shell and fastened to the operating spindle, ball bearings between the clutch member and a shoulder of said sleeve, a second clutch member in the shell, a spring bearing between the clutch members, a guide bushing for the enlarged opening of the sleeve, a driving shaft in the sleeve journaled in said bushing and fastened to the second clutch member, a han'- dle with a longitudinalopening in the sleeve, lugs extending from the sleeve and extending into the opening of the handle, a latch pivoted to said lugs and having a hook end and a handle, the hook end engaging the second member of the clutch, means to turn the driving shaft, a worm fastened to the operating spindle in said shell, a shaft journaled in the shell, a worm wheel fastened' to the shaft and meshing-with said worm, a cutter blade bearing-against said shell and fastened to said shaft, a bracket extending from said shell, a knife bracket extending from said bracket, a stationary cutter blade fastened to said knife guide bracket and spaced therefrom, the cutter blade extending into the space between the knife bracket and stationary cutter blade.

2. In a cutter of the character described the combinationl of a shell with an open side portion and an offset, a ysleeve extending from the shell, an operating .spindle in the shell extending into the sleeve, a worm secured to the spindle, a worm wheel in said ofl'set meshing with said worm, a shaft for the worm wheel extending through said offset, means to operate the spindle, a outter blade fastened to the shaft of theworm wheel bearing against the open side portion of the shell and forming a closed chamber therewith and a guide in the cutter coacting with said cutter blade.

3. In a portable power cutter the combination of a shell having an offset, a journal bearing formed in the shell, an operating spindle journaled in said bearing, a worm for said spindle, a shaft journaled in said offset transversely to said spindle, a worm wheel fastened to said shaft and meshing with said worm, a cutter blade supported on the shaft, means to turn the spindle and a guide bracket in the cuttercoacting with said cutter blade. a

4. Ina portable cutter the combination of a shell, a handle for'the cutter, a journal bearing in the shell, an operating spindle journaled in said bearing, a shaft ]ournaled in the shell transversely to said spindle, a

\ 10 gear connection between the spindle and the shaft, a cutter blade supported on the shaft, means to turn the spindle, a guide bracket in the cutter coacting with said cutter blade and a latch pivotd to the handle tovstart the turning of the cutter blade. Y

Signed at the' borough of Manhattan, city of New York, in the county of New York and State of New York this20th day of December A. D. 1921. y JOHN'HOLTZMAN. 

